JPH066810Y2 - Vertebral body fixation plate - Google Patents

Vertebral body fixation plate

Info

Publication number
JPH066810Y2
JPH066810Y2 JP1989138193U JP13819389U JPH066810Y2 JP H066810 Y2 JPH066810 Y2 JP H066810Y2 JP 1989138193 U JP1989138193 U JP 1989138193U JP 13819389 U JP13819389 U JP 13819389U JP H066810 Y2 JPH066810 Y2 JP H066810Y2
Authority
JP
Japan
Prior art keywords
vertebral body
screw
fixing
fixing plate
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1989138193U
Other languages
Japanese (ja)
Other versions
JPH0375717U (en
Inventor
聡 小島
浩巳 松▲崎▼
Original Assignee
旭光学工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭光学工業株式会社 filed Critical 旭光学工業株式会社
Priority to JP1989138193U priority Critical patent/JPH066810Y2/en
Priority to DE4038082A priority patent/DE4038082C2/en
Priority to US07/619,492 priority patent/US5147361A/en
Publication of JPH0375717U publication Critical patent/JPH0375717U/ja
Application granted granted Critical
Publication of JPH066810Y2 publication Critical patent/JPH066810Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7059—Cortical plates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

【考案の詳細な説明】 「技術分野」 本考案は、上下の椎体、特に脊椎椎体を固定する際に用
いる椎体固定用プレートに関する。[Technical Field] The present invention relates to a vertebral body fixing plate used for fixing upper and lower vertebral bodies, particularly vertebral bodies.

「従来技術およびその問題点」 例えば胸−腰椎体の一つが損傷した場合、その損傷椎体
を除去した後、損傷椎体の代わりに移植骨または人工骨
を挿入し、その上下の椎体間を、何らかの椎体固定器具
で機械的に固定する手術が行なわれる。このため従来、
椎体固定器具が使用されてきた。このような椎体固定器
具として必要な条件は、薄いこと、固定器具と椎体
を固定するスクリューが緩まないこと、椎体に固定器
具が密着すること、および手術が簡単であることがあ
げられる。“Prior art and its problems” For example, when one of the thoracic-lumbar vertebral bodies is injured, the injured vertebral body is removed, and then a bone graft or an artificial bone is inserted in place of the injured vertebral body, and the space between the vertebral bodies above and below the vertebral body. Is mechanically fixed with some kind of vertebral body fixing device. Therefore, conventionally
Vertebral fixation devices have been used. Necessary conditions for such a vertebral body fixing device include thinness, that the screws for fixing the fixing device and the vertebral body do not loosen, that the fixing device is in close contact with the vertebral body, and that surgery is easy. .

ところで従来の椎体固定器具として、接続すべき上下の
椎体にまず椎体プレートを打ち込むとともにねじ固定
し、次にこの椎体プレート間を別の複数の固定ねじおよ
びナットで固定するものが知られている。この椎体固定
器具は、上記〜の条件については優れている。しか
し、の手術の簡単さという点では、若干問題があっ
た。つまり固定ねじをナットを用いて椎体プレートの側
面から固定するには、小型のスパナを繰り返しナットに
着脱させるという時間のかかる作業を必要とする。さら
に固定ねじは、ねじりに対する抵抗力が弱いため、これ
を通常２本用い、その２本の固定ねじ間を別のねじれ防
止器具で接続しなければならない。接続作業に時間を要
することは、明らかに術者および患者の苦痛を増加させ
る。By the way, as a conventional vertebral body fixing device, there is known one in which the vertebral body plates are first driven and screwed to the upper and lower vertebral bodies to be connected, and then the vertebral body plates are fixed with a plurality of different fixing screws and nuts. Has been. This vertebral body fixing device is excellent in the above conditions (1) to (3). However, there were some problems in the ease of surgery. In other words, fixing the fixing screw from the side surface of the vertebral body plate using the nut requires a time-consuming work of repeatedly attaching and detaching the small spanner to the nut. Further, since the fixing screw has a weak resistance against twisting, it is usually necessary to use two fixing screws and to connect the two fixing screws with another twist prevention device. The time required for the connection work obviously increases the distress of the operator and the patient.

「考案の目的」 本考案は、このような従来の椎体固定器具についての問
題意識に基づき、より簡単な作業で上下の椎体間の接続
ができる椎体固定用プレートを得ることを目的とする。
また本考案は、椎体との固定強度およびねじりに対する
強度がともに強い椎体固定用プレートを得ることを目的
とする。[Object of the Invention] The present invention aims to obtain a vertebral body fixing plate that can connect the upper and lower vertebral bodies by a simpler operation based on the awareness of the problems regarding the conventional vertebral body fixing devices. To do.
Another object of the present invention is to obtain a vertebral body fixing plate that has both a high strength to fix the vertebral body and a high strength against torsion.

「考案の概要」 本考案は、一連の板状体からなる固定プレートの両端部
に、それぞれ椎体への固定部を設け、この椎体固定部に
それぞれねじ孔を形成し、このねじ孔に挿入する固定ね
じに、該ねじ孔に螺合する螺合ねじ部と、椎体内に進入
する進入ねじ部とを設け、かつこの進入ねじ部のねじピ
ッチP1を螺合ねじ部のねじピッチP2より大きく(P1＞P2)
としたことを特徴としている。[Outline of the Invention] The present invention provides a fixing plate for a vertebral body at both ends of a fixing plate composed of a series of plate-like bodies, and forms a screw hole in each of the vertebral body fixing parts. The fixing screw to be inserted is provided with a threaded screw part that is screwed into the screw hole and an entry screw part that enters the vertebral body, and the thread pitch P1 of this entry screw part is the thread pitch P2 of the threaded screw part. Greater (P1> P2)
It is characterized by

このようにねじピッチを設定すると、固定ねじの進入ね
じ部が椎体に螺合し、かつ螺合ねじ部が固定プレートの
ねじ孔に螺合した状態において、該固定ねじを回動させ
ると、進入ねじ部の進行量の方が螺合ねじ部の進行量よ
り多くなり、その結果、固定プレートが強固に椎体に固
定される。また板状の固定プレートは、ねじりに強い。When the screw pitch is set in this way, when the advancing screw portion of the fixing screw is screwed into the vertebral body and the screwing screw portion is screwed into the screw hole of the fixing plate, the fixing screw is rotated, The advancing amount of the entry screw portion is larger than the advancing amount of the screwing screw portion, and as a result, the fixing plate is firmly fixed to the vertebral body. Further, the plate-shaped fixing plate is strong against torsion.

「考案の実施例」 以下図示実施例について本考案を説明する。第１Ａ〜１
Ｃ図は本考案による固定プレート１０を示し、第２Ａ〜
２Ｃ図は固定ねじ２０を示す。"Embodiment of the Invention" The present invention will be described below with reference to illustrated embodiments. 1A-1
FIG. C shows a fixing plate 10 according to the present invention, which is shown in FIGS.
FIG. 2C shows the fixing screw 20.

固定プレート１０は、全体として平板状をしており、そ
の両端部に、コーナ部を円弧とした略矩形の椎体固定部
１１を有する。この椎体固定部１１には、その裏面に厚
肉部１２が一体に形成されており、この厚肉部１２に、
先端の尖った固定突起１３が突出形成されている。The fixing plate 10 has a flat plate shape as a whole, and has substantially rectangular vertebral body fixing portions 11 having arcs at corners at both ends thereof. A thick-walled portion 12 is integrally formed on the back surface of the vertebral body fixing portion 11.
A fixed projection 13 having a sharp tip is formed to project.

椎体固定部１１にはそれぞれ、略矩形状の椎体固定部１
１の対角線方向に離隔した一対のねじ孔１４，１５が形
成されている。この一対のねじ孔１４，１５はそれぞ
れ、第１Ｂ、１Ｄ図に示すように、椎体固定部１１の平
面方向と直交する方向に対し、椎体固定部１１の内側に
向けて傾斜（この実施例では約10゜）している。そして
このねじ孔１４とねじ孔１５のねじピッチはP2であり、
例えば1.5mm(p1.5)のピッチが設定される。Each of the vertebral body fixing portions 11 has a substantially rectangular shape.
A pair of screw holes 14 and 15 are formed diagonally away from each other. As shown in FIGS. 1B and 1D, the pair of screw holes 14 and 15 are inclined toward the inner side of the vertebral body fixing portion 11 with respect to the direction orthogonal to the plane direction of the vertebral body fixing portion 11 (this implementation). In the example, about 10 °). The screw pitch of the screw holes 14 and 15 is P2,
For example, a pitch of 1.5 mm (p1.5) is set.

固定ねじ２０は、頭部の大径の螺合ねじ部２１と、これ
に続く小径の進入ねじ部２２とを有する。螺合ねじ部２
１はねじ孔１４，１５に螺合されるもので、従ってその
ねじピッチP2は、ねじ孔１４，１５と同じであり、上述
の例に従って、例えば1.5mm(p1.5)に形成されている。
これに対し、進入ねじ部２２は、このピッチP2より大き
いねじピッチP1(P1＞P2)に形成されている。このピッチ
P1は例えば、1.75mm(p1.75)に設定される。またこの進
入ねじ部２２は、第２Ｂ図に示すように、引き抜きに強
い形状をした医療用ねじとして形成されている。なお螺
合ねじ部２１の端部には、第２Ｃ図に示すように六角レ
ンチの挿入孔２３が形成されている。The fixing screw 20 has a large-diameter threaded screw portion 21 on the head and a small-diameter entry screw portion 22 following the screw portion 21. Threaded screw part 2
1 is screwed into the screw holes 14 and 15, so that the screw pitch P2 thereof is the same as that of the screw holes 14 and 15, and is formed to, for example, 1.5 mm (p1.5) according to the above-mentioned example. .
On the other hand, the entry screw portion 22 is formed with a thread pitch P1 (P1> P2) larger than the pitch P2. This pitch
P1 is set to 1.75 mm (p1.75), for example. Further, as shown in FIG. 2B, the entry screw portion 22 is formed as a medical screw having a shape resistant to pulling out. A hexagon wrench insertion hole 23 is formed at the end of the threaded screw portion 21 as shown in FIG. 2C.

なお固定プレート１０および固定ねじ２０は、例えばチ
タン系合金から構成することができ、さらに必要に応
じ、その表面にアパタイト等の生体親和性の材料をコー
ティングすることができる。The fixing plate 10 and the fixing screw 20 can be made of, for example, a titanium-based alloy, and their surfaces can be coated with a biocompatible material such as apatite, if necessary.

上記構成の本椎体固定用プレートは、第３図に示すよう
に用いられる。損傷した脊椎椎体の部位に、移植骨（ま
たは人工骨）３０を挿入し、この移植骨３０の上下の脊
椎椎体３１に、それぞれ固定プレート１０の椎体固定部
１１を合致させる。この状態において、椎体固定部１１
を軽く叩いてその固定突起１３を脊椎椎体３１に進入さ
せ、仮止めすることができる。次に、ねじ孔１４とねじ
孔１５にそれぞれ固定ねじ２０を進入させ、レンチ挿入
孔２３に挿入した六角レンチによりねじ込み方向に回転
させる。すると進入ねじ部２２が脊椎椎体３１内に進入
し、やがて螺合ねじ部２１がねじ孔１４，１５に螺合す
る。この状態において、さらに固定ねじ２０をねじ込み
方向に回転させると、螺合ねじ部２１と進入ねじ部２２
のピッチの差により、固定ねじ２０の単位回転角当たり
の進入ねじ部２２の進行量の方が、螺合ねじ部２１のそ
れより大きくなる。このため、固定プレート１０が強固
に脊椎椎体３１に結合される。The vertebral body fixing plate having the above structure is used as shown in FIG. The bone graft (or artificial bone) 30 is inserted into the damaged vertebral body portion, and the vertebral body fixing portions 11 of the fixing plate 10 are respectively fitted to the upper and lower vertebral body bodies 31 of the bone graft 30. In this state, the vertebral body fixing portion 11
Can be tapped to allow the fixation projection 13 to enter the vertebral body 31 and temporarily fixed. Next, the fixing screws 20 are respectively inserted into the screw holes 14 and the screw holes 15, and are rotated in the screwing direction by the hexagon wrench inserted in the wrench insertion holes 23. Then, the entry screw portion 22 enters the vertebral body 31, and the screwing screw portion 21 is screwed into the screw holes 14 and 15 in due course. In this state, when the fixing screw 20 is further rotated in the screwing direction, the screwing screw portion 21 and the entry screw portion 22
Due to the difference in the pitches, the advancing amount of the entry screw portion 22 per unit rotation angle of the fixing screw 20 is larger than that of the screwing screw portion 21. Therefore, the fixing plate 10 is firmly connected to the vertebral body 31.

ねじ孔１４と１５の傾斜は、脊椎椎体３１内に位置する
神経束３２に固定ねじ２０が干渉しないようにするため
に設定されたものである。従って、このねじ孔１４と１
５の傾斜は、固定プレート１０および椎体固定部１１の
形状、該ねじ孔１４，１５の位置等の要素に応じ、適宜
設定することができる。The inclination of the screw holes 14 and 15 is set so that the fixing screw 20 does not interfere with the nerve bundle 32 located in the vertebral body 31. Therefore, these screw holes 14 and 1
The inclination of 5 can be appropriately set depending on factors such as the shapes of the fixing plate 10 and the vertebral body fixing portion 11 and the positions of the screw holes 14 and 15.

以上の作業は、固定ねじ２０をその頭部のレンチ挿入孔
２３に嵌めた六角レンチによって回転させることによっ
て行なうことができるから、非常に作業性がよく、短時
間で行なうことができる。また平板状の固定プレート１
０は、ねじりに強い断面形状であるから、固定プレート
１０がねじれ変形するおそれは皆無である。The above work can be performed by rotating the fixing screw 20 with a hexagonal wrench fitted in the wrench insertion hole 23 of the head thereof, so that the workability is very good and can be performed in a short time. Also, a flat plate-shaped fixed plate 1
Since 0 has a cross-sectional shape that is strong against torsion, there is no possibility that the fixing plate 10 is twisted and deformed.

「考案の効果」 以上のように本考案の椎体固定用プレートは、両端に椎
体固定部を有する固定プレートと、この椎体固定部に形
成したねじ孔に螺合させる固定ねじとからなるものであ
って、固定ねじには、ピッチが大小に異なる進入ねじ部
と螺合ねじ部が形成されており、進入ねじ部が椎体内
に、螺合ねじ部が固定プレートのねじ孔にそれぞれ螺合
されるものであるから、ピッチの違いにより、固定プレ
ートを強固に椎体に固定することができる。またその固
定作業は、固定ねじをその頭部を介して回動させて行な
うことができるから、非常に作業性がよく、従って手術
を簡単にすることができる。さらに請求項２に記載の椎
体固定用プレートによれば、固定ねじが椎体内の神経を
損傷するおそれをなくすことができる。[Advantage of Invention] As described above, the vertebral body fixing plate of the present invention comprises the fixing plate having the vertebral body fixing portions at both ends and the fixing screw to be screwed into the screw hole formed in the vertebral body fixing portion. The fixing screw is formed with an advancing screw part and a screwing screw part with different pitches, and the advancing screw part is in the vertebral body, and the screwing screw part is in the screw hole of the fixation plate. Since they are screwed together, the fixing plate can be firmly fixed to the vertebral body due to the difference in pitch. Further, since the fixing work can be performed by rotating the fixing screw through the head, the workability is very good and therefore the operation can be simplified. Further, according to the vertebral body fixing plate of the second aspect, it is possible to eliminate the possibility that the fixing screw damages the nerve in the vertebral body.

【図面の簡単な説明】[Brief description of drawings]

第１Ａ〜１Ｄ図は本考案の椎体固定用プレートの固定プ
レートを示すもので、第１Ａ図は平面図、第１Ｂ、１Ｄ
図はそれぞれ第１Ａ図のＢ−Ｂ線、Ｄ−Ｄ線に沿う断面
図、第１Ｃ図は第１Ａ図のＣ−Ｃ線に沿う断面を含む正
面図である。 第２Ａ〜２Ｃ図は固定ねじを示すもので、第２Ａ図は平
面図、第２Ｂ図は、第２Ａ図の上面図、第２Ｃ図は進入
ねじ部の拡大図、 第３図は本考案の椎体固定用プレートの使用態様を示す
正面図である。 １０……固定プレート、１１……椎体固定部、１２……
厚肉部、１３……固定突起、１４，１５……ねじ孔、２
０……固定ねじ、２１……螺合ねじ部、２２……進入ね
じ部、２３……レンチ挿入孔、３０……移植骨、３１…
…脊椎椎体、３２……神経束。1A to 1D show a fixing plate of a vertebral body fixing plate of the present invention, and FIG. 1A is a plan view, 1B and 1D.
1A is a sectional view taken along the line BB and DD of FIG. 1A, and FIG. 1C is a front view including a sectional view taken along the line CC of FIG. 1A. 2A to 2C show fixing screws, FIG. 2A is a plan view, FIG. 2B is a top view of FIG. 2A, FIG. 2C is an enlarged view of an entry screw portion, and FIG. 3 is the present invention. It is a front view which shows the usage condition of the plate for vertebral body fixation. 10 ... Fixing plate, 11 ... Vertebral body fixing part, 12 ...
Thick wall part, 13 ... fixing protrusion, 14, 15 ... screw hole, 2
0 ... Fixing screw, 21 ... Screwing screw part, 22 ... Entry screw part, 23 ... Wrench insertion hole, 30 ... Bone graft, 31 ...
... vertebral body, 32 ... nerve bundle.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】固定プレートの両端部に、それぞれ椎体へ
の固定部を設け、 この椎体固定部にそれぞれねじ孔を形成し、 このねじ孔に挿入する固定ねじに、該ねじ孔に螺合する
螺合ねじ部と、椎体内に進入する進入ねじ部とを設け、
かつこの進入ねじ部のねじピッチ(P1)を螺合ねじ部のね
じピッチ(P2)より大きく(P1＞P2)したことを特徴とする
椎体固定用プレート。1. Fixing parts to the vertebral body are provided at both ends of the fixing plate, and screw holes are formed in the vertebral body fixing parts, respectively, and a fixing screw to be inserted into the screw hole is screwed into the screw hole. Providing a threaded screw part that fits and an entry screw part that enters the vertebral body,
The vertebral body fixing plate is characterized in that the thread pitch (P1) of the entry thread portion is larger than the thread pitch (P2) of the threaded thread portion (P1> P2). 【請求項２】請求項１において、固定プレートのねじ孔
は、固定ねじが椎体内の神経束位置を避けるべく、固定
プレートの平面方向と直交する方向に対して傾斜してい
る椎体固定用プレート。2. The vertebral body fixation according to claim 1, wherein the screw holes of the fixing plate are inclined with respect to a direction orthogonal to a plane direction of the fixing plate so that the fixing screw avoids a nerve bundle position in the vertebral body. Plate.
JP1989138193U 1989-11-29 1989-11-29 Vertebral body fixation plate Expired - Lifetime JPH066810Y2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1989138193U JPH066810Y2 (en) 1989-11-29 1989-11-29 Vertebral body fixation plate
DE4038082A DE4038082C2 (en) 1989-11-29 1990-11-29 Vortex connection arrangement
US07/619,492 US5147361A (en) 1989-11-29 1990-11-29 Vertebral connecting plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989138193U JPH066810Y2 (en) 1989-11-29 1989-11-29 Vertebral body fixation plate

Publications (2)

Publication Number Publication Date
JPH0375717U JPH0375717U (en) 1991-07-30
JPH066810Y2 true JPH066810Y2 (en) 1994-02-23

Family

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Family Applications (1)

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JP1989138193U Expired - Lifetime JPH066810Y2 (en) 1989-11-29 1989-11-29 Vertebral body fixation plate

Country Status (3)

Country Link
US (1) US5147361A (en)
JP (1) JPH066810Y2 (en)
DE (1) DE4038082C2 (en)

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DE4038082C2 (en) 1993-11-11
US5147361A (en) 1992-09-15
DE4038082A1 (en) 1991-06-06
JPH0375717U (en) 1991-07-30

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